Sigma 24-105mm f/4 lens gets official, will launch in November

Earlier this week, we learned about a new upcoming full-frame lens from Sigma that would offer a constant f/4 aperture across its 24-105mm focal length and be available in Sigma, Nikon, Canon and Sony mounts. Sigma has now made that lens official, and also told us that it will ship in November (though we still don't know the price).

Matching what we heard earlier, the Sigma 24-105mm F4 DG OS HSM will have 19 elements in 14 groups, including "high-performance glass elements, including SLD, FLD, which is equal to fluorite, and glass-molded single- and double-sided aspheric lenses have been included into the optical system to prevent aberration, field curvature, distortions and color aberration." It has nine diaphragm blades, and a minimum aperture of f/22. It will take 82mm filters, and has a minimum focusing distance of 45cm (17.7 inches). Unsurprisingly, it's a fairly large lens, measuring 4.3 inches long, 3.5 inches in diameter, and weighing 31.2 ounces.

As with other recent Sigma lenses, the 24-105mm F4 is compatible with Sigma's USB dock, so you can update the firmware and make focal microadjustments. It's also eligible for the Sigma mount conversion service if you change camera brands, and want to take your lens with you.

While Sigma has told us that the new lens will launch in November, we unfortunately don't know what it will retail for when it lands. But given Sigma's recent run of excellent quality lenses for affordable prices, it should grab the attention of many a full-frame shooter.